filename

[RedLars]

Hi,

How can check using .NET 1.1 that a string contains a valid filename
for winxp?

The application in question has a textbox where user can enter
filename and only the filename. It should not allowed to enter path
+filename like "c:\tmp\myfile. log" or relative paths "..\tmp
\myfile.log" - no directory info should be allowed, only the filename.

Any suggestions.

[Cowboy \(Gregory A. Beamer\)]

if(File.Exists( filePathFromTex tBox))
{
//Do work
}
else
{
//Display error
}

Exists has been around since the early days. I believe it was 1.0. It was
definitely 1.1:
http://msdn.microsoft.com/en-us/libr...rs(VS.71).aspx

--
Gregory A. Beamer
MVP, MCP: +I, SE, SD, DBA

Subscribe to my blog
http://feeds.feedburner.com/GregoryBeamer#

or just read it:
http://feeds.feedburner.com/GregoryBeamer

*************** *************** **************
| Think outside the box! |
*************** *************** **************
"RedLars" <Li***********@ gmail.comwrote in message
news:9e******** *************** ***********@x35 g2000hsb.google groups.com...

Hi,

How can check using .NET 1.1 that a string contains a valid filename
for winxp?

The application in question has a textbox where user can enter
filename and only the filename. It should not allowed to enter path
+filename like "c:\tmp\myfile. log" or relative paths "..\tmp
\myfile.log" - no directory info should be allowed, only the filename.

Any suggestions.

[=?Utf-8?B?RmFtaWx5IFRyZWUgTWlrZQ==?=]

You should just need to check if the string contains any invalid filename
characters as returned by Path.GetInvalid FilenameChars.

http://msdn.microsoft.com/en-us/libr...namechars.aspx

"RedLars" wrote:

Hi,

How can check using .NET 1.1 that a string contains a valid filename
for winxp?

The application in question has a textbox where user can enter
filename and only the filename. It should not allowed to enter path
+filename like "c:\tmp\myfile. log" or relative paths "..\tmp
\myfile.log" - no directory info should be allowed, only the filename.

Any suggestions.

[rhaazy]

On Sep 24, 9:45*am, RedLars <Liverpool1...@ gmail.comwrote:

Hi,

How can check using .NET 1.1 that a string contains a valid filename
for winxp?

The application in question has a textbox where user can enter
filename and only the filename. It should not allowed to enter path
+filename like "c:\tmp\myfile. log" or relative paths "..\tmp
\myfile.log" - no directory info should be allowed, only the filename.

Any suggestions.

Just check your string to make sure there are no occurences of \
..IndexOf("\");

[Ignacio Machin ( .NET/ C# MVP )]

On Sep 24, 9:45 am, RedLars <Liverpool1...@ gmail.comwrote:

Hi,

How can check using .NET 1.1 that a string contains a valid filename
for winxp?

The application in question has a textbox where user can enter
filename and only the filename. It should not allowed to enter path
+filename like "c:\tmp\myfile. log" or relative paths "..\tmp
\myfile.log" - no directory info should be allowed, only the filename.

Any suggestions.

I do not of any method in File class that check if a name is valid.
the simplest thing is to check for the \ character. You could use a
regular expression to better check for invalid chars.

[OD]

the best is certainly using a regular expression.
following sample check long file name validity :
^[^\\\./:\*\?\"<>\|]{1}[^\\/:\*\?\"<>\|]{0,254}$

--
OD___
www.e-naxos.com

[RedLars]

Let me re-phrase the question.

By opening notepad, selecting Save as.. and typing in 'g/fgh.txt' the
application wont save the file because the filename is invalid.

How can I using .NET 1.1 check if a given string contains only a valid
filename? It should not include path and filename.

Thank you.

>On 24 Sep, 15:51, "Cowboy \(Gregory A. Beamer\)" <NoSpamMgbwo... @comcast.netNoS pamMwrote:
if(File.Exists( filePathFromTex tBox))
{
* *//Do work}

else
{
* * //Display error

}

Exists has been around since the early days. I believe it was 1.0. It was
definitely 1.1:http://msdn.microsoft.com/en-us/libr...members(VS.71)...

--
Gregory A. Beamer
MVP, MCP: +I, SE, SD, DBA

Subscribe to my bloghttp://feeds.feedburne r.com/GregoryBeamer#

or just read it:http://feeds.feedburner.com/GregoryBeamer

*************** *************** **************
| Think outside the box! * * * * * * * * * * * * * * * |
*************** *************** **************" RedLars" <Liverpool1...@ gmail.comwrote in message

news:9e******** *************** ***********@x35 g2000hsb.google groups.com...

Hi,

How can check using .NET 1.1 that a string contains a valid filename
for winxp?

The application in question has a textbox where user can enter
filename and only the filename. It should not allowed to enter path
+filename like "c:\tmp\myfile. log" or relative paths "..\tmp
\myfile.log" - no directory info should be allowed, only the filename.

Any suggestions.

[Jay Riggs]

On Sep 24, 6:45*am, RedLars <Liverpool1...@ gmail.comwrote:

Hi,

How can check using .NET 1.1 that a string contains a valid filename
for winxp?

The application in question has a textbox where user can enter
filename and only the filename. It should not allowed to enter path
+filename like "c:\tmp\myfile. log" or relative paths "..\tmp
\myfile.log" - no directory info should be allowed, only the filename.

Any suggestions.

RedLars,

If you want to check if a given string could be a valid filename only
(even for files that don't exist), you can use a RegEx.

I've been using this one lately:
^[^ \\/:*?""<>|]+([ ]+[^ \\/:*?""<>|]+)*$

Which I got here:
http://regexlib.com/REDetails.aspx?regexp_id=2286

A word of warning: using just this regex will not allow you to
identify the several strings Windows will not allow for filenames
(such as nul, com1, etc.). I've been regexs that covered includes
there reserved words can can't find it now.
HTH
-Jay

[Jay Riggs]

On Sep 24, 7:48*am, Family Tree Mike
<FamilyTreeM... @discussions.mi crosoft.comwrot e:

You should just need to check if the string contains any invalid filename
characters as returned by Path.GetInvalid FilenameChars.

http://msdn.microsoft.com/en-us/libr...getinvalidfile...

"RedLars" wrote:

Hi,

How can check using .NET 1.1 that a string contains a valid filename
for winxp?

The application in question has a textbox where user can enter
filename and only the filename. It should not allowed to enter path
+filename like "c:\tmp\myfile. log" or relative paths "..\tmp
\myfile.log" - no directory info should be allowed, only the filename.

Any suggestions.- Hide quoted text -

- Show quoted text -

Unfortunately, you can't use this method in 1.1.

[=?Utf-8?B?RmFtaWx5IFRyZWUgTWlrZQ==?=]

Oops! You're right, I missed that in the doc. Sorry!

"Jay Riggs" wrote:

On Sep 24, 7:48 am, Family Tree Mike
<FamilyTreeM... @discussions.mi crosoft.comwrot e:

You should just need to check if the string contains any invalid filename
characters as returned by Path.GetInvalid FilenameChars.

http://msdn.microsoft.com/en-us/libr...getinvalidfile...

"RedLars" wrote:

Hi,

How can check using .NET 1.1 that a string contains a valid filename
for winxp?

The application in question has a textbox where user can enter
filename and only the filename. It should not allowed to enter path
+filename like "c:\tmp\myfile. log" or relative paths "..\tmp
\myfile.log" - no directory info should be allowed, only the filename.

Any suggestions.- Hide quoted text -

- Show quoted text -

Unfortunately, you can't use this method in 1.1.